1. Ultrathin SnO2 electron transport layers for perovskite solar cells by combustion method at low temperature.
- Author
-
Zhang, Jiejing, Wang, Haiyue, Yang, Qingyun, Gao, Can, Gao, Chunxiao, and Liu, Xizhe
- Subjects
- *
SOLAR cells , *STANNIC oxide , *LOW temperatures , *TIN oxides , *ELECTRON mobility , *ELECTRON transport - Abstract
Electron transport layers can collect photo-generated electrons and suppress interfacial recombination, which are crucial for efficient perovskite solar cells. Tin oxide is a suitable electron transport material for its wide bandgap, high electron mobility, low photocatalytic activity and appropriate energy band offsets. For the deposition of tin oxide layers, SnCl 2 precursor is usually used for the conventional solution spin-coating method. In this work, we developed an in-situ synthesized precursor, and ultrathin tin oxide layers were obtained by the combustion process at 150 °C. Furthermore, the devices with these tin oxide layers can achieve the PCE of 19.6%, while conventional tin oxide layers with SnCl 2 precursor lead to the PCEs of 16.9% and 14.9% with and without plasma treatment. This improvement can be related to the enhanced photoelectron collection and superior interfacial contact. This work provides a facile method for fabricating SnO 2 electron transport layers of perovskite solar cells at low temperature. [Display omitted] • A novel SnO 2 precursor solution was developed by the in-situ synthesis from tin powder. • SnO 2 ETLs with high purity were prepared by the combustion process at low temperature. • Ultrathin SnO 2 ETLs were obtained with enhanced charge collection and interfacial contact. • PSCs with newly developed SnO 2 ETLs were superior to devices by conventional SnCl 2 precursor. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF